Steam-engine.



PUBMED MAY 14, 19o?. Y

o. L. :summa STEAM 'Emma APPLIGATEQX PLB L' l, 19GB.

3 SHEETS-SHEET 3A mix ww w NIIIEF) STATES PATENT OFFICE.

STEAi-ENGINE.

Specification of Letters Patent.

)intenten May 14, 1907.

Application tiled July 11,1906. Serial No. 325.648.

To il whom, 'muy norte/irrt:

llo it known that [yl (tirantes Ii. Sonoma, a citizen of the United States of .flnieriea and a resident of Wheeling rounty ol Ohio, and State ol' Test \fir {inial have invented eortain new and useful Ilnproveniente in Steam-Engines, of wlzieli the i'oliowing a speoiiie:1

.tion

My invention relates to new and useful iinprovemenls in steam engines, and more partieularly to that elass of steal'n engines hav ing opposite]y-reeiproeating pistons; and it eonsists in the particular eonstruetiinl, arrangement and voinbination of parts Whirli will hereinafter be fully described.

The objef't of my invention is to provide a sleani engine in whieh the steam is exhausted from on e part of the evlinder to another after havingl been utilized to eause the outward stroke ot the pistons and is there utilized to assist in producing the return stroke thereof; or, in other Wfiirds7 to provide a steam engine in which the steam is twiee utilized, and in Whioh7 consequently, an increase of power is secured with a given volume of steam, or a given power is secured with a diminished volume of steam.

A further ohjeet of the invention is to provide a simple and novel device whereby the admission oi steam to the cylinder is automatiealljyT regulated and the Ordinar),T steam chest is Wholijv dispensed with.

Further objects of the invention will be made apparent as further progress is made in this specification.

In describing the invention in detail, reference is herein had to the accompanying drawings, forming a part of this speeiiieationy in Which-- Figure 1 is a perspeetive view of the invention; Figs. 2 and 3 are vertical longitudinal sections of the same, respectivelyY showing the pistons at the beginning and end of the outward stroke; Fig. 4 is a top plan view of the invention; Fig. 5 is a eross section on the line 5- 5, Fig. 3; and Fig. 6 is a front elevation of the front piston.

Referring to said drawings, in which like reference numerals designate like parts tlnoughout the several views 1 indicates the o vlinder and 2 the steam-supply pipe leading direetljiT thereto on one side midway between the ends thereof. In said cylinder are two oppositelv-operatingar pistons 3 and 4 encentrieally mounted upon the ends of piston rods 5 and respectively, the piston rod 5 projecting from the piston 3 through the piston et, as shown. Said piston rods 5 and are projeeted through the rear end of the nylinder 1 and are respectively attached to slides T and S which freely slide in a guide formed by parallel plates Q and il). The in-Y ner or front ends of said plates are bolted or otherwise rigid] secured to the rear face of the cylinder and are rigidly supported at their rear ends bv a stanehion 11 having arms 12 for securing it to an ordinary bedilate. Said piates 9 and 1() are provided with longitudinal grooves 13 in their opposing far-es in which travel Corresponding tongues 14 provided on the ends of said slides 7 and S. Pivotallyr attached to the rear edges of said slides 'F and S are pitmen 15 and 16 respectivel4v for oonneetlng said slides with ordinary oppositely-disposed cranks carried by the driving shaft.

0n the inner faoe of each piston at a point substantiallliT registering with the entrance port of the steam-supply pi e 2, when said pistons oeeupy positions at t e center of the cylinder, is a small groove, said grooves forming a passageway or entrance 1? hetween the pistons for the steam at the beginning of the outward stroke. i In the outer face of the piston 3 is a shallow socket which communicates at its inner end with the tapered end of a substantially conical opeilin leading through said piston from its inner lace, said socket and opening forming?,r an aperture 18 through said piston. In said aperture is mounted a slidable pin 19 havinv a stern Z0 and a tapered head 21, said head eing adapted to seat in the eonieai opening and to serve as a valve for preventing the passage of steam When so seated from the inner to the outer side of said piston. When the pin i9 is seated in said aperture, the stem 2G thereof projects outward beyond the face of the piston, as shown in Fig, A cap 22 on the outer end of said stem prevents the dislodffment or' said pin. In the outer fase of' said piston and eoniniunieating with the soeket hereinbefore referred to is one or more shallow radiating grooves 23 which extend bevond. the edge of the eap 22 to admit of the ready passa e of steam throu fh the aperture 18 when t 1e pin is unseatei as shown in Fig. -that is, to admit of communication through the a erture Without hindrance from said oap. he ob- IOO IIO

ject of the closable aperture in said piston will hereinafter be made apparent.

ln the steam-supplyv pipe 2 is a valve 24 adapted to be manipulated to open and close communieation between said pipe and the cylinder l. As a means otA autolnaticalllv opening and closing said valve, l employv :L simple valve-operating device which is indirectlyr connected with and operated bv one of said pistons. Fixed upon the upper end ol' the valve-stein 25 is a lever 2u having :i tapered point 27 and :L rounded rear eml 2H. Extending parallel to the c vlinder t and rigidivV secured at its rear end to a post 2t) which is mounted in the side ol' the slide 7 is :L rod 3U. Said rod lies contiguous to the point 27 ofthe lever 26 and is slidablv mounted in the rear ol its front end in a lug I which is attaehed to and projects from the front end of the cylinder, as shown. Adjustably mounted on said rod 3() at a suitable point is :L collar 32 to which is at'taelied one end of a rod 33 which projects forward to and engages the rounded rear end 28 off said lever. 'lhe point .'34 of said rod 33 is curved substantially as shown in Figs. 1 and 4 and is adapted. to push upon said lever to open the valve as said rod 3() begins to move l'orward at the beginning of the outward stroke of the pistons, thus admitting steam to the cylinder between said pistons. In the return stroke of said pistons, the point 34- of said rod 33 engages and pulls said lever back, closing the valve. A bent spring 35, suitably mounted, as shown, serves to normallv hold said rod .'33 in a position for engaging said lever, but admits of said rod being sprung baek when the lever has been moved to its limit and to slide past said lever. Upon said rod 3() in front of the lever 26 is an adjustable eollar 36 adapted to engage the point of said lever as it is turned forward b v the rod 33, as hereinbetore described, to limit the forward turning movement of said lever. A similar adjustable eollar 37 provided on said rod 30 in the rear of said lever to engage the point of said lever and limit the rearward turning movement thereoiI when it is turned baek hv said rod 33.

Pivoted at right angles upon the extreme front end of the rod 3() which projects some distance bevond the front end of the evlinder is a rod. 38, the front or free end of which is adapted for engaging the outer end ot a slidable pin 39 which is mounted in the front end of said cylinder. Said pin 39 registers with. or, is in line with, the pin 1t) and is adapted under certain conditions to engage therewith, as will be more full)T explained hereinafter. Said rod 38 rests upon and is supported in a substalitiallv horizontal position b v a stationaryT pin 40 which is mounted upon the front end of the o vlinder and is inclined downward slightly, as shown. iWlhen resting upon the eXtrel'ne front end ofsaid pin 40, the

rod ISS stands with its free end directl \Y behind the pin Sift and is adapted to force said pin itt) inward as it travels rearwardl)Y with the rod ii() to which it is attached. ns it travels rearwardly, the said rod N is gradually raised or elevated at its l'ront end until it frees itself from engagement with said pin titl, being so elevated bv the inclined pin It() over which it slides in its travel.

The invention operates snbstmitiallv as l'ollows: Assuming all the parts to he properlv adjusted and the pistons to oeeup)Y positions in the center of the evlinder, as shown in Fig. 2, steam is admitted past the valve 24, which is then partially open, through the steam-supply pipe 2 to the interior of the c vl- :nder :Lnd hetweei'l the opposing l'aees of the pistons through the pass:tgewaaj IT. There expanding, the steam l'orees said pistons in opposite directions, or toward the ends of the e vlindcr, commu]licating motion, tlnough the intermediate mechanism lwreinbefore described, to the main shaft, or driving shaft, As the piston it moves to fard the front end of the cylinder, the rod 3U, which is indirectlyY attached to said piston, tnoves forward therewith and. in so moving, the point IH ol' the rod 3P engages and pushes upon the rear end of the lever 2U, fullv opening said valve 124-. Sinndtaneouslv with the full opening of said valve, the point of said lever is engaged b v the adjustable collar 37 and its turning movement stopped therebv, and the point of the rod 533 slips b v the rear end of said lever. Said collar 3T, continuing to travel forward with the rod 3() to the end of the stroke, carries with it the point of the lever and completelyv closes said valve 4 at the end` ot the stroke. The slidable pin t9 in the piston 3 remains seated in the aperture 1S as the pistons are being forced outward, being held :in that position bv the pressure of the steam between the pistons. Just before the piston 2' reaches the limit ol its outward stroke, the cap 22 of said slidable pin 1Q strikes against the inner end of the slidable pin Si) and is thereby vtoreed baekward and unseated, permitting the steam to exhaust through the aperture 1S from between the pistons 3 and 4 to the end of the C vlinder in `front of said piston 3, where it, acting upon the outer taee of said piston, exerts a small foree which assists in forcing or driving said piston back on its return or inward stroke, the remainder oiI the power for said stroke being obtained from the momentum of the ordinary tlv wheel on the driving -shalt Att er having been utilized in the end of the evlinder, the steam exhausts to the atmosphere through the exhaust pipe As the pistons move toward each other on the return or inward stroke, the rod 30 is moved rearwardlv with the piston to which, as before stated, it is indireetlv attm'hed. The valve 2-1, which has been closed at the IOO end el die @inward Srrnlie ui the liereinlael'ure lleeeri'wel, renmnle elneeil nnnY jne. "tiefere lie pietnne realen the linut n2 leir inwerrl rnmenienl. when llae lever if; engaged ai ne penn by the feller 3; le

l nuiveil lierelny in a, pneilinn enliennlielly .in right angles.: Tn he eyiniler. "pfirLinllj: nnen ing lle valve for the admission eli ereein. iinnlzrnenne wirll will rim-lief! n i ille Yelve, rire end 34 n' rire rml 33 Y. peet the rem' end e? the lexer m ire erin, i pneilion, nr he starring point.

Yhen *glie rml 3G commencer; ile return nievenien Willi the inward mevr-inner n 'ie pietnne, tlie l'ree end mi the rml i ngg unter eml nl the slillzrlile gain 25* anni ir said pin inward llierezilz wel pin {nllnwingf ilreel'y bellied lie pin i me 9 holding; lle aperture orner -ee @sul nl enel rml 'i bein @Winfried in n enliel'nninlljy innig-rimini position lig lie ineliner pin U ie' grmimy reieeri es rax'ele meer v, Until, n1 llae ein! ei *elle inruil-il .elmlie nl' l' pieone, il relenies sind pin Si?. The eenln enex'ing lw eylinder innmllizfiely ve; eee .will 'pin lil le eee itself' in sniil nixiernre l5, :unl ilu eening nl snik! pin llrnse lie pin Z, n'llielx le in @uninet lleren'ili, nnlwerel willi enneideralle nri'e. An erin 1X1 prnvirlecl nn lie renr eille nlK lw lrnn end ni eeirl rml 21S :servee ne e stop l'nr nel nin 2? nen i is llnnet nuwz'nll. ne vinel ine! ieneili. Smid pin is lins prevernerl rmer mfg enlwnrll n. .snllieien lietanee le inernre Willi llxe md 3S- nramnlngg ire in' per pneinn tlwrelnlanarl when ii nlfn'ee nreerfl e'iill lw nan'ziril grml@ ni rl-ie p' 125 indieetes nil-enne lncnerl ai pointe. in the (leviee.

have eleeclilml my inveninn more er lese in fleeil, lint il, is nlwinns tha verinne slight (-h-ulggee may be umile in the emxsrraeY Lion anni arrangement nl Sonie nl' the perle composing he inveninn Without llepnring frein Ille general mzirit 1r een@ lierenf. llenee i de net wish n lirnii n -lil he precise cenet notion herein described.

Having time rleecriliell infr inveniien, what i elninr ne new, and ile-sire in gendre 'by Le ters Panini, is4

1. In :1x Steam. engine, the Combination with a, driving Sheri having oppneiely Slis posed cranks, of e. Cylinder, npnnsilely reciprnfeiny; pisnns in said eyliniler, nperative HSS,

Sun able ineens Conneeing' seid l-sinne with een cranks, n steam-supply pipe neening inn ineens whereby lhe laebnientienecl valve is l pneed eranks, of n, cylinder,

zr'riteineiceljf opened mul tively a.; rereeranineil Vninle in rarel nl' Seid pieten.

2. In e. einem engine. lire Y win a ilriving shnlf' inning* ey-isposed cranks, of e vjyinser, eppnsieijx, reeiprnez-rfringj gienne ,in seni ejrlinrier, eperative Ineens. ennneering sind pisrens with said k3, n steam-s1 1' mening into W @Glieder midway beim. Vn alie ende herenf, e valve in seid sigfey eine, greens nneraed by une of Snill pieons Whereliay seid valve is aunnmnieelly nmnipnle'ml 1n open and vlnse connunnientiun hem-een will snp ely pipe and eail (Ilina'ier sind also ln regnlee *ille admission eff' seein *I0 said Cylinder, a, valve in the l'nrenioet ef ee'nl pistons, and menne whereby lie lneenienlnned veive is nnolnaienilj; ngenei' ee n predeernined peint in ille travel n? said piston in aiiew the eeein lnhinil seid pie-ron to exlnme n The epgesie eine llierenl'.

3. in a. steam engine, lie combination Wifll :L driving herr .inning nppneitel il pained cran uf a eylimler, oppositely reeigmeeting i;

@lesen respeche line nl ons in enel cylinder, operntive menne connecting Seid pistons willi said cranks. einem-Supply pipe opening into Seid eyiner millwnly between ille ende lheren, n. valve in nel Supply pipe, ineens. npereted by one nl :mill pistnne whereby said valve is entmnaieelly nimiipnlaeil to nnen und einer ennnnnnienlinn lievfeen mill Supply pipe and :said eliniler and else tn regnlate he admission nl ste-nin tn seid ejlinder, :i valve in the lnrenloal nf eniel giistonsinl Wirernl die lust-ineniiiined Valve is mnmnniieelly opened nl nr neer Eins end ni che euweril slrnlie nf Said *piston tn allow the Ster-nn behind Suill piston tn eenst in the nppnse eide thereof, and als@ whereby seid valve ie-helrl nnen uxnil sind pieten erneebes ehe enel nf irs inward streke.

4. in a steam engine, the eernninetion Wih e driving shaft lim-'ing nppnslely disposed neanke", nl ejylinrler. :ippneiirely reciprocating nieuwe in said cylinder, operative means @Generating eeiil pistons with said cranks, n :steam-Supply pipe opening inte seid cyliin er midway beween ihe eerie thereo', n relive in seid supply pipe, ineens operated by ene ef Seid istnns whereby Said vulve is, antenmtieally nmnipnlnled tu open and close conmlunieation between seid snpnly pipe and Seid eylinder :xml aise te regnine the :ulnieeien @if Semn tn* said ejslirnler and ineens im' exhausting the alcuni which has been ntiiize nerrfeen Said pistone in prndncing die outward Smke thereof tn rhe'enel nl' the eylindr in freut nl the 'fnreninet piemn tn he again n ed in assist in prndneing the renrn erreiie thereof.

in er steam engine, ille eonininnion with e driving shaft having oppnsiey clisoppeeitel recipl'IO roeating pistons in said cylinder, operative connections between said pistons and said cranks, said connections eonsisting ot' piston rods attached to said pistons, one of said rods projecting through and operating in the piston attarhed to the other rod, slides attached to said piston rods outside said cylinder, and pitmen pi\\'otall.\,v attaehed at one end to said slides and at the other to said cranks, a steam-supply pipe leading into said cylinder midwa)Y between the ends thereof to diseharge steam between said pistons, a valve in said supply pipe, a lever fixed upon the stem of said valve, a rod eonneeted at one end to the slide whieh is operated by the foremost of said pistons, said rod extendingforward parallel to said cylinder and eontiguous to said lever and being slidably mounted at its front end, adjustable collars carried by said rod for engaging the point of said lever at predetermined points in the travel olsaid rod to manipulate said valve, a second rod adjustably mounted upon the Erst-mentioned rod, said second rod adapted for engaging the rear end of said lever at predetermined points in its travel to manipulate said lever, a Valve in the foremost oi' said pistons, said valve adapted to be elosed by the incoming steam from said supplyY pipe and to remain closed to oi' near to the end of the outward stroke of said foremost piston, means for unseating said Valve at or near the end ofsaid stroke to allow steam behind said piston to exhaust to the end of the eylinderin front oi' said piston, and means for holding said valve unseated to or near to the end of the inward stroke ot' said piston.

Signed by me in the presence of two seribing witnesses.

CHARLES L. SCHULTZ.

sub-

litnesses il. E. DUNLAP, RoBT. F. DILwoRTH. 

